WD violet drives have been engineered specifically for surveillance, so theyre able to withstand the elevated heat fluctuations & equipment vibrations within a NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always-on environment of a high-definition surveillance system. A disruption to a drive could result in a failure that impacts multiple users, your security archive, or even the entire system. With WD violet, you get reliable, surveillance-class storage thats tested for compatibility in a wide-range of security systems. Industry-leading storage. Surveillance you can trust. WD is a worldwide leader in the hard drive industry. With WD violet surveillance storage, you have a drive engineered for high temperature, always-on surveillance systems so you can rely on quality video playback when you need it most. Whether youre protecting loved ones or monitoring your business, WD violet offers performance you can trust. Wide compatibility. Seamless integration. WD violet hard drives are built with compatibility in mind, so you can quickly & seamlessly add capacity to your surveillance system. With a wide range of industry-leading enclosures & chipsets supported, youre sure to find the DVR or NVR configuration thats right for you.* Each WD violet drive is optimized to support up to 64 cameras. With so many options, you have the flexibility to upgrade or expand your security system in the future.